Sliding-door lock



L.`E.' JAGOBUS. -sLI DDDDDD of; LOOK.

y Patented Jan. v24, 1893.

ATENT LYMAN E. JACOBUS, OF ROMULUS, NEWYORK.

SLIDING-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 490,441, dated January24, 1893.

Application-tiled July 15 1892. Serial No. 440,140. (No model.)

To all whom it may concern.-

Be it known that I, LYMAN E. JACOBUS, of Romulus, in the county ofSeneca, in the State of New York, have invented new and usefulImprovements in Locks, of which the following, taken in connection withthe accompanying drawings, is a full, clear, and eX- act description.

My invention relates to locks adapted to hold the meeting rails of sash,or the Stiles of doors, securely together.

My object is to produce alock for sash or doors which is simple andeffective, and cannot be unlocked from the outside, as by the insertionof a knife blade or other tool between the rails, or stiles; and whichoperates to draw such rails or Stiles together; and which consists oftwo inter-locking and swinging cams suitably mounted, one upon each ofthe meeting rails or stiles.

My invention consists in the several novel features of construction andoperation hereinafter described and which are specifically set forth inthe claims hereunto annexed. It is constructed as follows, referencebeing had to the accompanying drawings in which- Figure l,is a frontelevation of the lock showing the members mounted upon door stiles andunlocked. Fig. 2, isa like view of thesamelocked. Fig. 3,isa sectionalelevation of the lever cani, and the catch to secure it.

A B represent the meeting Stiles of two doors, as sliding doors, or themeeting rails of two sash; or B may represent a door post or casing.

Upon A, I pivot the lever cam ctconcaved as at b, and provided `with ahook c. This cam is shown as mount-ed upon a plate, d, secured to thestile, or rail, and provided with notches n, with which the spring catcheis adapted to engage, to hold the lever in the desired position. Thiscatch may play vertically through the lever and be provided with abutton, as shown.

Upon B, I pivot the swinging cam h, shown as mounted upon a plate, k,secured as shown. Then when the Stiles or rails are brought together thelever cam is turned upon its pivot, so that its hooked end will engagewith the point m, of the other cam, and thereafter both cams will swingtogether, the cam, h, rocking in the cam concavity of the lever, andgradually draws the Stiles or rails together, because the respectivepivots are not in horizontal alignment until when the cam facescoincide, as shown, the locking is completed and the catch snaps intoits seat and holds the lever in position. This catch is not absolutelynecessary, as the lever will not ordinarily become shifted to unlock,but the catch adds an element of security.

What I claim as my invention and desire to secure by Letters Patentisz-- 1. A lock comprising a pivotal lever provided with a cam concavityin one edge, and a terminal hook at the end of said concavity projectingbackward partly over it, in combination with a pivotal convex cam,adapted to iitinto the concavityof said levercam, and having a pointadapted to engage with saidy hook when said lever is operated.

2.. A lock comprising a pivotal lever provided with a cam concavity inone edge, and a terminal hook atthe end of said concavity projectingbackward partly over it, 'in combination with a pivotal convex cam,adapted to fit into the concavity of said lever cam, and having a pointadapted to engage with said hook when saidlever is operated, and aspring catch in said lever adapted to secure said lever in its lockedand unlocked positions.

In Witness whereof I have hereunto set my hand this 6th day of July,1892.

LYMAN E. JACOBUS.

In presence of- HERBERT A. CARHART, HOWARD P. DENIsoN.

